US20140324315A1 - Castor control system - Google Patents
Castor control system Download PDFInfo
- Publication number
- US20140324315A1 US20140324315A1 US14/358,111 US201214358111A US2014324315A1 US 20140324315 A1 US20140324315 A1 US 20140324315A1 US 201214358111 A US201214358111 A US 201214358111A US 2014324315 A1 US2014324315 A1 US 2014324315A1
- Authority
- US
- United States
- Prior art keywords
- castor
- brake
- control system
- servo motor
- activator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B33/00—Castors in general; Anti-clogging castors
- B60B33/0078—Castors in general; Anti-clogging castors characterised by details of the wheel braking mechanism
- B60B33/0092—Castors in general; Anti-clogging castors characterised by details of the wheel braking mechanism actuated remotely, e.g. by cable or electrically
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B33/00—Castors in general; Anti-clogging castors
- B60B33/02—Castors in general; Anti-clogging castors with disengageable swivel action, i.e. comprising a swivel locking mechanism
- B60B33/021—Castors in general; Anti-clogging castors with disengageable swivel action, i.e. comprising a swivel locking mechanism combined with braking of castor wheel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B2200/00—Type of product being used or applied
- B60B2200/20—Furniture or medical appliances
- B60B2200/24—Beds
- B60B2200/242—Hospital beds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B33/00—Castors in general; Anti-clogging castors
- B60B33/0036—Castors in general; Anti-clogging castors characterised by type of wheels
- B60B33/0042—Double or twin wheels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B33/00—Castors in general; Anti-clogging castors
- B60B33/0047—Castors in general; Anti-clogging castors characterised by details of the rolling axle
- B60B33/0049—Castors in general; Anti-clogging castors characterised by details of the rolling axle the rolling axle being horizontal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B33/00—Castors in general; Anti-clogging castors
- B60B33/0047—Castors in general; Anti-clogging castors characterised by details of the rolling axle
- B60B33/0057—Castors in general; Anti-clogging castors characterised by details of the rolling axle the rolling axle being offset from swivel axis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B33/00—Castors in general; Anti-clogging castors
- B60B33/006—Castors in general; Anti-clogging castors characterised by details of the swivel mechanism
- B60B33/0065—Castors in general; Anti-clogging castors characterised by details of the swivel mechanism characterised by details of the swivel axis
- B60B33/0068—Castors in general; Anti-clogging castors characterised by details of the swivel mechanism characterised by details of the swivel axis the swivel axis being vertical
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B33/00—Castors in general; Anti-clogging castors
- B60B33/02—Castors in general; Anti-clogging castors with disengageable swivel action, i.e. comprising a swivel locking mechanism
- B60B33/028—Castors in general; Anti-clogging castors with disengageable swivel action, i.e. comprising a swivel locking mechanism being actuated automatically
Definitions
- the present invention relates to a castor control system and methods for operating such a system.
- Castors usually comprise a fork from which a mounting pin projects vertically.
- a running wheel is mounted via a horizontal axle.
- the fork can swivel about the vertical axis of the mounting pin and the running wheel can rotate about the horizontal axis of its mounting axle.
- the castors are normally equipped with means for locking the swivel and means for braking the wheel. These means can be applied either alone or in combination.
- Such a castor is described in GB 2 457 787 to Oy Mannerin Konepaja AB.
- the brake and locking means are normally mechanically interconnected such that they can be operated via a pedal.
- a bed is disclosed in EP 618 088 A2 to Hill-Rom.
- the undercarriage of a hospital bed comprises a common control of the castors which can be operated by a common actuation device.
- the undercarriage comprises a bed movement sensor and a central processor unit. If the hospital bed has not been moved for a specified period of time, the central processor unit will automatically apply the brakes of the castor wheels by means of the common actuation device.
- the braking and/or locking of the undercarriage is easier with the use of the common actuation device.
- adding, the common actuation device to the mechanically interconnected castors merely increases the total weight of the undercarriage, which makes it very heavy to move around and to maneuver.
- GB 2 457 787 to Oy Mannerin Konepaja AB describes a castor with a swivel lock and a wheel brake having a common activation shaft. In a first position the common activation shaft locks the swivel. In a second position the activation shaft locks the swivel and activates the wheel brake.
- Each castor includes a pedal for manual operation. In another embodiment the pedal is replaced with a motor actuator, such as an electric motor mounted thereon. Manual operation of the pedal or actuation of the motor will cause the common activation shaft to move between the positions mentioned.
- the castor with the motor actuator is convenient in use, it can be problematic if there is no power available or if the control system fails.
- the castor In the braked position the castor cannot swivel about the vertical axis nor can the wheels rotate about the horizontal axis. Thus, the castor is immovable.
- the castor can be equipped with an electronic brake activator connected to the brake activator of the castor. The three positions can thereby be reached by activating the brake activator via the electric brake activator. Hence, the castor can be operated both manually and automatically.
- the objective of the invention is to provide an improved castor control system with an increased reliability, usability and safety.
- a castor comprising a mounting pin with a vertical rotational axis about which the castor can swivel, at least one wheel rotatable about a horizontal axis ( 6 ), and a brake activator cooperating to set the castor in: a directional lock position where the castor cannot swivel about the vertical axis of the mounting pin and the wheel can rotate freely about the horizontal axis, or a brake position where the wheel cannot rotate about the horizontal axis and where the castor cannot swivel about the vertical axis of the mounting pin, or a neutral position where the castor can swivel freely about the vertical axis of the mounting pin and the wheel can rotate freely about the horizontal axis.
- the castor is characterized in that it further comprises a servo motor assembly comprising a servo motor, a printed circuit board, a microprocessor and at least one switch, and where the servo motor is connected to the brake activator.
- the castor can thus be operated both manually and automatically. Moreover, the castor is able to give a status on the position of the brake activator.
- the castor comprises a motion sensor.
- the castor can provide a status on whether it is in motion or not.
- the present invention further provides a castor control system comprising at least two castors of the above mentioned type and where the castor control system further comprises an electric brake controller, a power supply and an operating panel.
- the electric brake controller of the castor control system can also comprise a microprocessor.
- the castor control system thus provides control of the castors either individually, in pairs or as a plurality. Combined with the ability to give the status of the position of the brake activator of each castor, this provides a wide range of possibilities for usability and safety, which will be described in the following.
- the electric brake controller of the castor control system can set the operating panel to indicate the position of the brake activator of each of the castors.
- the user can ensure that the brake activator of each castor is set in the intended position.
- the electric brake controller of the castor control system can set the castors in the brake position if the brake activator of one of the castors has been manually set in the brake position. This greatly increases the ease of using the castors in the castor control system. If the castor control system is installed in an article of hospital or care furniture, a caretaker can within a few seconds brake all castors by operating the brake activator of only one castor. Within a moment the caretaker can ensure that the braking position of all castors has been reached by reading off the operating panel, which can indicate the position of the brake activator of each castor in the castor control system.
- the electric brake controller of the castor control system can set at least one of the castors in the directional lock position if the brake activator of one of the other castors has been manually set in the directional lock position.
- a caretaker moving the article of furniture can hereby obtain control of the article of furniture during motion by having either the front or rear pair of castors set in a directional lock position.
- the caretaker can simply read off the operating panel which indicates the position of the brake activator of each castor.
- the electric brake controller comprises a voltage source detector to determine whether or not the castor control system is connected to mains voltage.
- the electric brake controller of the castor control system can set the brake activator of each of the castors in the brake position if the motion sensor of one or more castors detects motion and the castor control system at the same time is connected to mains voltage.
- the mains power supply is normally provided via a cable with a plug connected to a wall socket. The castor control system will here prohibit that this cable is ripped out of the wall thus avoiding damages to equipment and personal .injury.
- hidden damages to the cable such as cutting off conducting wires or short circuiting of the conducting wires, caused by tearing out the cable of the wall are also avoided.
- the present invention further provides an article of hospital or care furniture comprising a castor control system as described above.
- the present invention also relates to a patient lift comprising a castor control system as described above.
- FIG. 1 illustrates a castor
- FIG. 2 illustrates the three positions, in which the brake activator of the castor in FIG. 1 can be set
- FIG. 3 schematically illustrates the inside of a servo motor assembly
- FIG. 4 schematically illustrates a castor control system comprising four castors of the type illustrated in FIG. 1 ,
- FIG. 5 illustrates a linear actuator system incorporating a castor control system of the type illustrated in FIG. 4 ,
- FIG. 6 illustrates a hospital or care bed incorporating the linear actuator system illustrated in FIG. 5 .
- FIG. 7 illustrates a patient lift incorporating the linear actuator system illustrated in FIG. 5 .
- FIG. 1 illustrates a castor 1 with a mounting pin 2 having a vertical rotational axis 3 about which the castor 1 can swivel.
- the castor 1 comprises a set of wheels 4 , 5 which can rotate about a horizontal axis 6 .
- a brake activator 7 is arranged above the wheels 4 , 5 and can be set in three different positions by pivoting it up and down as indicated by the arrow 8 about the axis 9 .
- the castor 1 is locked in a given direction 11 .
- This means that the wheel 4 , 5 can rotate freely, however the mounting pin 2 is locked in a preferred direction. This allows the castor 1 to travel along a surface in the direction 11 .
- the brake activator 7 If the brake activator 7 is set in the lower position 12 (Braked), the castor 1 will be fully locked or braked. This means that the castor 1 cannot swivel about the vertical axis 3 of the mounting pin 2 and the wheels 4 , 5 cannot rotate about the horizontal axis 6 . Hence, the castor 1 is completely immovable. Setting the brake activator 7 in the middle position 13 (neutral) will allow the castor 1 to swivel freely about the vertical axis 3 of the mounting pin 2 and the wheels 4 , 5 to rotate freely about the horizontal rotation axis 6 .
- the brake activator 7 of the castor 1 is connected to a servo motor assembly 14 .
- the servo motor assembly 14 comprises a servo motor 15 , a printed circuit board (PCB) 16 , a microprocessor 17 , a motion sensor 18 , and two switches 19 , 20 .
- the motion sensor 18 could for example be an accelerometer.
- the servo motor 15 is coupled to the brake activator 7 either directly or indirectly via a transmission, such as a gear, or via a lever arm embodied as a fork 21 .
- the fork 21 is in engagement with a lever arm 22 of the motor axle 23 of the servo motor 15 .
- the brake activator 7 can be set in one of the three positions described above, namely directional lock 10 , neutral 13 , and braked 12 .
- the two switches 19 , 20 are arranged such that they can be activated and deactivated by one of the three positions in which the brake activator 7 can be set via the pins 25 , 26 .
- the switches 19 , 20 are connected to the microprocessor 17 which can receive the signal generated by the switches 19 , 20 .
- the servo motor assembly 14 is housed in a closed cabinet 27 .
- FIG. 4 schematically illustrates a castor control system comprising four castors 29 , 30 , 31 , 32 of the castor 1 type with the servo motor assembly 14 described above.
- the castor control system 28 could purposefully be utilized when mounted in an article of hospital or care furniture (see FIG. 6 ) or a patient lift (see FIG. 7 ).
- Each of the castors 29 , 30 , 31 , 32 is connected to the electric brake controller 33 via the connector cable 34 having a plug 35 (see FIG. 3 ).
- the electric brake controller 33 is connected to the power supply 36 and the operating panel 37 , and comprises a microprocessor 38 .
- All four castors 29 , 30 , 31 , 32 can be set in the locked position 12 either via the operating panel 37 or by manually setting one of the castors 29 , 30 , 31 , 32 in the locked position 12 .
- the signal from the operating panel 37 is forwarded to the electric brake controller 33 which, via the servo motor assembly 14 , sets the brake activator 7 of each castor 29 , 30 , 31 , 32 in the locked position 12 .
- This will also cause the brake activator 7 to be set in the locked position 12 .
- an operator such as a caretaker or hospital porter manually presses the brake activator 7 of for example castor 29 into the locked position 12 .
- the change in the position of the brake activator 7 is registered by the switches 19 , 20 .
- This information is forwarded to the electric brake controller 33 by a microprocessor 17 of the servo motor assembly 14 of the castor 29 . Having processed this information the electric brake controller 33 commands the remaining three castors 30 , 31 , 32 also to be set in the locked position 12 .
- all four castors 29 , 30 , 31 , 32 can be set in the neutral position 13 either via the operating panel or by manually setting just one of the castors 29 , 30 , 31 , 32 in the neutral position 13 .
- the castor control system 28 When the castor control system 28 is mounted in an article of hospital or care furniture it is required that one pair of castors 29 , 30 ; 31 , 32 can be set in the directional lock position 10 . This will allow the operator to better move the article of hospital or care furniture from one place to another. Also here the castors 29 , 30 , 31 , 32 can operated via the operating panel or by manually operating one of the castors 29 , 30 , 31 , 32 which is to be set in the directional lock position 10 . In the latter situation the operator manually presses the brake activator 7 of one of the castors 29 , 30 , 31 , 32 , for example 29 , into the directional lock position 10 .
- the change in the position of the brake activator 7 of the castor 29 is registered by the switches 19 , 20 .
- This information is processed by the microprocessor 17 and forwarded to the electric brake controller 33 by the servo motor assembly 14 of the castor 29 . Having processed this information the electric brake controller 33 commands the other castor 30 also to be set in the position directional lock 10 .
- the two remaining castors 31 , 32 are set in the neutral position 13 .
- the pair of castors 31 , 32 could also be set in the directional lock position 10 and the other pair of castors 29 , 30 set in the neutral position 13 .
- the castor control system 28 installed in the article of hospital or care furniture could also be programmed with a brake time delay for setting all the castors 29 , 30 , 31 , 32 in the locked position 12 if the hospital or care furniture has not been in motion in a prescribed period of time.
- the present invention is using castors 1 , 29 , 30 , 31 , 32 which each are equipped with a motion sensor 18 . This improves the reliability of the castor control system 28 as the castor control system 28 delay can receive and optionally compare data from all motion sensors.
- the electric brake controller 33 receives feedback from each of the castors 29 , 30 , 31 , 32 as to whether they have reached the commanded and thereby intended position. If this is not the case the castor control system 28 could provide an audible/visible/tactile alarm via the electric brake controller 33 and/or the operating panel 37 .
- This feedback loop can be applied to all positions 10 , 12 , 13 in which the castor 1 (and hence the brake activator 7 ) can be set.
- the position of the brake activator 7 is registered by the microprocessor 17 via the switches 19 , 20 of the servo motor assembly 14 .
- This information is processed by the microprocessor 17 and forwarded to the microprocessor 38 of the electric brake controller 33 . If the brake activator 7 and thereby the castor 1 is not in the intended position, this information can be provided as an alarm to an operator, visually, auditory and/or tactile, or a combination of the three for example via the electric brake controller 33 and/or the operating panel 37 .
- the position status of the brake activators 7 of each of the castors 29 , 30 , 31 , 32 can also be indicated on the operating panel 37 .
- the electric brake controller 33 is connected to the power supply 36 .
- the electric brake controller 33 can optionally be supplied with power from a mains voltage source 40 via a cable 41 inserted in a wall socket.
- the cable 41 could cause a dangerous situation for people or equipment in proximity of the article of furniture.
- the cable 41 is pulled out of the wall socket this could damage the wall socket and the plug of the cable could hit people or equipment in proximity thereof.
- hidden damages to the cable 41 could be caused by tearing out the cable 41 of the wall. Such damages could e.g. be cutting the conducting wires of cable 41 or damaging the isolation of the conducting wires such that a short circuit could occur. Consequently, the electric brake controller 33 comprises a voltage source detector 42 for determining whether the electric brake controller 33 is connected to mains voltage 40 .
- the castor control system 28 provides a visual/audible/tactile alarm and/or sets the castors 29 , 30 , 31 , 32 in the braked position 12 .
- the castor control system 28 could be connected to a motion sensor placed elsewhere. In this situation the servo motor assembly 14 of the castors 29 , 30 , 31 , 32 need not comprise a motion sensor. Hereby, a cheaper servo motor assembly 14 can be used.
- the microprocessor 17 will command the servo motor 15 to bring the brake activator 7 back to the previous position. For both situations it is not required that the brake activator 7 reaches the other position, but merely that it is brought out of its intended position. This intermediate position will also be registered by the switches 19 , 20 and cause the electric brake controller 33 and/or the microprocessor 17 to react as described. Also here the castor control system 28 could be connected to a motion sensor placed elsewhere. Hence, the servo motor assemblies 14 of the castors 29 , 30 , 31 , 32 need not comprise a motion sensor. Hereby, a cheaper servo motor assembly 14 can be used.
- FIG. 5 illustrates the castor control system 28 incorporated in a linear actuator system 43 .
- the linear actuator system 43 comprises a control box 44 supplied with power from a battery 45 or mains voltage 40 .
- the linear actuator system 43 further comprises a number of linear actuators 46 and an operating panel 47 both connected to the control box 44 .
- the electric brake controller 33 is connected to and powered by the control box 44 .
- the castor control system 28 can hereby be controlled by the operating panel 47 via the control box 44 . Through the same connection the electric brake controller 33 can provide feedback to the control box 44 .
- the control box 44 operates as a master and the electric brake controller 33 as a slave.
- the linear actuator system 43 could also comprise an additional operating panel.
- the linear actuators 46 are of a type comprising a thrust rod.
- This type of linear actuator comprises a spindle with a spindle nut.
- the spindle is driven by a reversible electric motor through a transmission.
- the spindle nut is moved in an inwards or outwards direction depending on the direction of rotation of the electric motor.
- the linear actuator is a separate product with the spindle, transmission and electric motor enclosed in a housing.
- the housing typically consists of a motor housing and an outer tube.
- An inner tube is secured to the spindle nut.
- the inner tube is displaced in and out of the outer tube as the spindle nut is moved in and out on the spindle.
- the inner tube comprises a front mounting.
- the outer side of the motor housing is furnished with a rear mounting. The front mounting and rear mounting are used to secure the linear actuator in the structure which should be adjusted.
- FIG. 6 schematically illustrates a hospital or care bed 48 incorporating the linear actuator system 43 shown in FIG. 5 .
- the hospital or care bed 48 comprises four castors 29 , 30 , 31 , 32 , hence the double references for the two castors illustrated.
- the linear actuators 46 can be used to elevate the upper frame carrying the mattress of the bed relative to the undercarriage.
- the linear actuators 46 can also be used to elevate the head rest, back rest and leg rest of the bed 48 .
- FIG. 7 illustrates a patient lift 49 incorporating the linear actuator system 43 of FIG. 5 .
- the linear actuator 46 is used to move the arm 50 up and down, so as to lift a patient.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manipulator (AREA)
- Invalid Beds And Related Equipment (AREA)
- Handcart (AREA)
- Body Structure For Vehicles (AREA)
Abstract
Description
- The present invention relates to a castor control system and methods for operating such a system.
- Castors usually comprise a fork from which a mounting pin projects vertically. In the fork a running wheel is mounted via a horizontal axle. The fork can swivel about the vertical axis of the mounting pin and the running wheel can rotate about the horizontal axis of its mounting axle. Mounted on hospital and care furniture, the castors are normally equipped with means for locking the swivel and means for braking the wheel. These means can be applied either alone or in combination. Such a castor is described in
GB 2 457 787 to Oy Mannerin Konepaja AB. - In hospital beds the brake and locking means are normally mechanically interconnected such that they can be operated via a pedal. Such a bed is disclosed in EP 618 088 A2 to Hill-Rom. A further development of this principle is described in
EP 1 945 166 A2 to LINET SPOL S.R.O. Here, the undercarriage of a hospital bed comprises a common control of the castors which can be operated by a common actuation device. The undercarriage comprises a bed movement sensor and a central processor unit. If the hospital bed has not been moved for a specified period of time, the central processor unit will automatically apply the brakes of the castor wheels by means of the common actuation device. The braking and/or locking of the undercarriage is easier with the use of the common actuation device. However, adding, the common actuation device to the mechanically interconnected castors merely increases the total weight of the undercarriage, which makes it very heavy to move around and to maneuver. -
GB 2 457 787 to Oy Mannerin Konepaja AB describes a castor with a swivel lock and a wheel brake having a common activation shaft. In a first position the common activation shaft locks the swivel. In a second position the activation shaft locks the swivel and activates the wheel brake. Each castor includes a pedal for manual operation. In another embodiment the pedal is replaced with a motor actuator, such as an electric motor mounted thereon. Manual operation of the pedal or actuation of the motor will cause the common activation shaft to move between the positions mentioned. Although the castor with the motor actuator is convenient in use, it can be problematic if there is no power available or if the control system fails. - This drawback is overcome in WO 2008/148169 A1 to Fallshaw Holdings PTY LTD which discloses a castor having a brake activator which can be set in three different positions to put the castor in a directional lock, neutral or braked position. In the first position (directional lock) the castor is not able to swivel about a vertical axis, but the wheels of the castor can rotate freely about a horizontal axis. Hereby the castor can only move in one direction. In the neutral position the castor can swivel about a vertical axis and the wheel can rotate freely about a horizontal axis, hence the castor can be moved in any direction. In the braked position the castor cannot swivel about the vertical axis nor can the wheels rotate about the horizontal axis. Thus, the castor is immovable. The castor can be equipped with an electronic brake activator connected to the brake activator of the castor. The three positions can thereby be reached by activating the brake activator via the electric brake activator. Hence, the castor can be operated both manually and automatically.
- The objective of the invention is to provide an improved castor control system with an increased reliability, usability and safety.
- According to the invention this is solved by providing a castor comprising a mounting pin with a vertical rotational axis about which the castor can swivel, at least one wheel rotatable about a horizontal axis (6), and a brake activator cooperating to set the castor in: a directional lock position where the castor cannot swivel about the vertical axis of the mounting pin and the wheel can rotate freely about the horizontal axis, or a brake position where the wheel cannot rotate about the horizontal axis and where the castor cannot swivel about the vertical axis of the mounting pin, or a neutral position where the castor can swivel freely about the vertical axis of the mounting pin and the wheel can rotate freely about the horizontal axis.
- The castor is characterized in that it further comprises a servo motor assembly comprising a servo motor, a printed circuit board, a microprocessor and at least one switch, and where the servo motor is connected to the brake activator. The castor can thus be operated both manually and automatically. Moreover, the castor is able to give a status on the position of the brake activator.
- In a further embodiment the castor comprises a motion sensor. Hereby, the castor can provide a status on whether it is in motion or not.
- The present invention further provides a castor control system comprising at least two castors of the above mentioned type and where the castor control system further comprises an electric brake controller, a power supply and an operating panel. The electric brake controller of the castor control system can also comprise a microprocessor. The castor control system thus provides control of the castors either individually, in pairs or as a plurality. Combined with the ability to give the status of the position of the brake activator of each castor, this provides a wide range of possibilities for usability and safety, which will be described in the following.
- According to a method of the present invention the electric brake controller of the castor control system can set the operating panel to indicate the position of the brake activator of each of the castors. Hereby, the user can ensure that the brake activator of each castor is set in the intended position.
- According to a method of the present invention the electric brake controller of the castor control system can set the castors in the brake position if the brake activator of one of the castors has been manually set in the brake position. This greatly increases the ease of using the castors in the castor control system. If the castor control system is installed in an article of hospital or care furniture, a caretaker can within a few seconds brake all castors by operating the brake activator of only one castor. Within a moment the caretaker can ensure that the braking position of all castors has been reached by reading off the operating panel, which can indicate the position of the brake activator of each castor in the castor control system.
- According to a method of the present invention the electric brake controller of the castor control system can set at least one of the castors in the directional lock position if the brake activator of one of the other castors has been manually set in the directional lock position. This eases the use of the castor control system. If the castor control system is installed in an article of hospital or care furniture, a caretaker moving the article of furniture can hereby obtain control of the article of furniture during motion by having either the front or rear pair of castors set in a directional lock position. To ensure that the intended position of the brake activator of each castor in the castor control system has been reached, the caretaker can simply read off the operating panel which indicates the position of the brake activator of each castor.
- In a further embodiment of the castor control system, the electric brake controller comprises a voltage source detector to determine whether or not the castor control system is connected to mains voltage. According to a method of the present invention the electric brake controller of the castor control system can set the brake activator of each of the castors in the brake position if the motion sensor of one or more castors detects motion and the castor control system at the same time is connected to mains voltage. In the case that the castor control system is installed in an article of hospital or care furniture the mains power supply is normally provided via a cable with a plug connected to a wall socket. The castor control system will here prohibit that this cable is ripped out of the wall thus avoiding damages to equipment and personal .injury. In addition hidden damages to the cable, such as cutting off conducting wires or short circuiting of the conducting wires, caused by tearing out the cable of the wall are also avoided.
- The present invention further provides an article of hospital or care furniture comprising a castor control system as described above.
- The present invention also relates to a patient lift comprising a castor control system as described above.
- Further characteristics of the present invention are described in the following, where:
-
FIG. 1 illustrates a castor, -
FIG. 2 illustrates the three positions, in which the brake activator of the castor inFIG. 1 can be set, -
FIG. 3 schematically illustrates the inside of a servo motor assembly, -
FIG. 4 schematically illustrates a castor control system comprising four castors of the type illustrated inFIG. 1 , -
FIG. 5 illustrates a linear actuator system incorporating a castor control system of the type illustrated inFIG. 4 , -
FIG. 6 illustrates a hospital or care bed incorporating the linear actuator system illustrated inFIG. 5 , and -
FIG. 7 illustrates a patient lift incorporating the linear actuator system illustrated inFIG. 5 . -
FIG. 1 illustrates acastor 1 with a mountingpin 2 having a verticalrotational axis 3 about which thecastor 1 can swivel. Thecastor 1 comprises a set ofwheels horizontal axis 6. Abrake activator 7 is arranged above thewheels arrow 8 about theaxis 9. As illustrated inFIG. 2 in the upper position 10 (directional lock) thecastor 1 is locked in a givendirection 11. This means that thewheel pin 2 is locked in a preferred direction. This allows thecastor 1 to travel along a surface in thedirection 11. If thebrake activator 7 is set in the lower position 12 (Braked), thecastor 1 will be fully locked or braked. This means that thecastor 1 cannot swivel about thevertical axis 3 of the mountingpin 2 and thewheels horizontal axis 6. Hence, thecastor 1 is completely immovable. Setting thebrake activator 7 in the middle position 13 (neutral) will allow thecastor 1 to swivel freely about thevertical axis 3 of the mountingpin 2 and thewheels horizontal rotation axis 6. - The
brake activator 7 of thecastor 1 is connected to aservo motor assembly 14. As illustrated schematically inFIG. 3 theservo motor assembly 14 comprises aservo motor 15, a printed circuit board (PCB) 16, amicroprocessor 17, amotion sensor 18, and twoswitches motion sensor 18 could for example be an accelerometer. Theservo motor 15 is coupled to thebrake activator 7 either directly or indirectly via a transmission, such as a gear, or via a lever arm embodied as afork 21. Thefork 21 is in engagement with alever arm 22 of themotor axle 23 of theservo motor 15. When themotor axle 23 is rotated about theaxis 24, thebrake activator 7 can be set in one of the three positions described above, namelydirectional lock 10, neutral 13, and braked 12. The twoswitches brake activator 7 can be set via thepins switches microprocessor 17 which can receive the signal generated by theswitches servo motor assembly 14 is housed in aclosed cabinet 27. -
FIG. 4 schematically illustrates a castor control system comprising fourcastors castor 1 type with theservo motor assembly 14 described above. - The
castor control system 28 could purposefully be utilized when mounted in an article of hospital or care furniture (seeFIG. 6 ) or a patient lift (seeFIG. 7 ). Each of thecastors electric brake controller 33 via theconnector cable 34 having a plug 35 (seeFIG. 3 ). Theelectric brake controller 33 is connected to thepower supply 36 and theoperating panel 37, and comprises amicroprocessor 38. - All four
castors position 12 either via theoperating panel 37 or by manually setting one of thecastors position 12. In the former situation the signal from the operatingpanel 37 is forwarded to theelectric brake controller 33 which, via theservo motor assembly 14, sets thebrake activator 7 of eachcastor position 12. This will also cause thebrake activator 7 to be set in the lockedposition 12. In the latter situation an operator such as a caretaker or hospital porter manually presses thebrake activator 7 of forexample castor 29 into the lockedposition 12. The change in the position of thebrake activator 7 is registered by theswitches electric brake controller 33 by amicroprocessor 17 of theservo motor assembly 14 of thecastor 29. Having processed this information theelectric brake controller 33 commands the remaining threecastors position 12. - In a similar way all four
castors neutral position 13 either via the operating panel or by manually setting just one of thecastors neutral position 13. - When the
castor control system 28 is mounted in an article of hospital or care furniture it is required that one pair ofcastors directional lock position 10. This will allow the operator to better move the article of hospital or care furniture from one place to another. Also here thecastors castors directional lock position 10. In the latter situation the operator manually presses thebrake activator 7 of one of thecastors directional lock position 10. The change in the position of thebrake activator 7 of thecastor 29 is registered by theswitches microprocessor 17 and forwarded to theelectric brake controller 33 by theservo motor assembly 14 of thecastor 29. Having processed this information theelectric brake controller 33 commands theother castor 30 also to be set in the positiondirectional lock 10. For obtaining an optimal control of the hospital or care furniture the two remainingcastors neutral position 13. In an analogous manner the pair ofcastors directional lock position 10 and the other pair ofcastors neutral position 13. - With the purpose of increasing the safety, the
castor control system 28 installed in the article of hospital or care furniture could also be programmed with a brake time delay for setting all thecastors position 12 if the hospital or care furniture has not been in motion in a prescribed period of time. The present invention is usingcastors motion sensor 18. This improves the reliability of thecastor control system 28 as thecastor control system 28 delay can receive and optionally compare data from all motion sensors. Furthermore, theelectric brake controller 33 receives feedback from each of thecastors castor control system 28 could provide an audible/visible/tactile alarm via theelectric brake controller 33 and/or theoperating panel 37. - This feedback loop can be applied to all
positions brake activator 7 is registered by themicroprocessor 17 via theswitches servo motor assembly 14. This information is processed by themicroprocessor 17 and forwarded to themicroprocessor 38 of theelectric brake controller 33. If thebrake activator 7 and thereby thecastor 1 is not in the intended position, this information can be provided as an alarm to an operator, visually, auditory and/or tactile, or a combination of the three for example via theelectric brake controller 33 and/or theoperating panel 37. The position status of thebrake activators 7 of each of thecastors operating panel 37. - As illustrated in
FIG. 4 theelectric brake controller 33 is connected to thepower supply 36. Theelectric brake controller 33 can optionally be supplied with power from amains voltage source 40 via acable 41 inserted in a wall socket. In the case that the article of hospital or care furniture comprising thecastor control system 28 is moved without being disconnected from themains 40, thecable 41 could cause a dangerous situation for people or equipment in proximity of the article of furniture. Further, if thecable 41 is pulled out of the wall socket this could damage the wall socket and the plug of the cable could hit people or equipment in proximity thereof. Even worse, hidden damages to thecable 41 could be caused by tearing out thecable 41 of the wall. Such damages could e.g. be cutting the conducting wires ofcable 41 or damaging the isolation of the conducting wires such that a short circuit could occur. Consequently, theelectric brake controller 33 comprises avoltage source detector 42 for determining whether theelectric brake controller 33 is connected tomains voltage 40. - If the
voltage source detector 42 detects that theelectric brake controller 33 is connected tomains voltage 40 and amotion sensor 18 in at least one of thecastors castor control system 28 provides a visual/audible/tactile alarm and/or sets thecastors position 12. By disconnecting theelectric brake controller 33 frommains voltage 40, the hospital or care furniture can be moved without triggering the alarm or the brake activation. Thecastor control system 28 could be connected to a motion sensor placed elsewhere. In this situation theservo motor assembly 14 of thecastors servo motor assembly 14 can be used. - During movement of an article of hospital or care furniture equipped with the
castor control system 28 personnel might unintentionally strike thebrake activator 7 of one of thecastors FIG. 2 ). In this situation thecastor control system 28 can be designed to immediately bring thecastor directional lock 10 or neutral 13 (seeFIG. 2 ). This functionality could be provided in the following way: One or more of themotion sensors 18 of theservo motor assembly 14 of thecastors electric brake controller 33 via themicroprocessors 17 of each of theservo motor assemblies 14. When thebrake activator 7 of one of thecastors FIG. 2 ) this is immediately registered by theswitches servo motor assembly 14 and the information is forwarded to theelectric brake controller 33, as described above. In response, theelectric brake controller 33, via theservo motor assembly 14, sets thebrake activator 7 in its previous position. This functionality could also be decentralized to eachservo motor assembly 14. Here theelectric brake controller 33 commands eachservo motor assembly 14 to maintain the current position of thebrake activator 7. If theswitches brake activator 7 is set in a different position, themicroprocessor 17 will command theservo motor 15 to bring thebrake activator 7 back to the previous position. For both situations it is not required that thebrake activator 7 reaches the other position, but merely that it is brought out of its intended position. This intermediate position will also be registered by theswitches electric brake controller 33 and/or themicroprocessor 17 to react as described. Also here thecastor control system 28 could be connected to a motion sensor placed elsewhere. Hence, theservo motor assemblies 14 of thecastors servo motor assembly 14 can be used. -
FIG. 5 illustrates thecastor control system 28 incorporated in alinear actuator system 43. Thelinear actuator system 43 comprises acontrol box 44 supplied with power from abattery 45 ormains voltage 40. Thelinear actuator system 43 further comprises a number oflinear actuators 46 and anoperating panel 47 both connected to thecontrol box 44. Theelectric brake controller 33 is connected to and powered by thecontrol box 44. Thecastor control system 28 can hereby be controlled by the operatingpanel 47 via thecontrol box 44. Through the same connection theelectric brake controller 33 can provide feedback to thecontrol box 44. In thelinear actuator system 43 thecontrol box 44 operates as a master and theelectric brake controller 33 as a slave. Although not illustrated thelinear actuator system 43 could also comprise an additional operating panel. Thelinear actuators 46 are of a type comprising a thrust rod. This type of linear actuator comprises a spindle with a spindle nut. The spindle is driven by a reversible electric motor through a transmission. When the spindle is driven, the spindle nut is moved in an inwards or outwards direction depending on the direction of rotation of the electric motor. The linear actuator is a separate product with the spindle, transmission and electric motor enclosed in a housing. The housing typically consists of a motor housing and an outer tube. An inner tube is secured to the spindle nut. The inner tube is displaced in and out of the outer tube as the spindle nut is moved in and out on the spindle. In the opposite end of the spindle nut the inner tube comprises a front mounting. The outer side of the motor housing is furnished with a rear mounting. The front mounting and rear mounting are used to secure the linear actuator in the structure which should be adjusted. -
FIG. 6 schematically illustrates a hospital orcare bed 48 incorporating thelinear actuator system 43 shown inFIG. 5 . Although not shown the hospital orcare bed 48 comprises fourcastors linear actuators 46 can be used to elevate the upper frame carrying the mattress of the bed relative to the undercarriage. Thelinear actuators 46 can also be used to elevate the head rest, back rest and leg rest of thebed 48. -
FIG. 7 illustrates apatient lift 49 incorporating thelinear actuator system 43 ofFIG. 5 . Here, thelinear actuator 46 is used to move thearm 50 up and down, so as to lift a patient.
Claims (15)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK201100890 | 2011-11-14 | ||
DKPA201100890 | 2011-11-14 | ||
DKPA201100890 | 2011-11-14 | ||
PCT/DK2012/000120 WO2013071932A1 (en) | 2011-11-14 | 2012-11-13 | Castor control system |
Publications (2)
Publication Number | Publication Date |
---|---|
US20140324315A1 true US20140324315A1 (en) | 2014-10-30 |
US9266392B2 US9266392B2 (en) | 2016-02-23 |
Family
ID=58720513
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/358,111 Expired - Fee Related US9266392B2 (en) | 2011-11-14 | 2012-11-13 | Castor control system |
Country Status (8)
Country | Link |
---|---|
US (1) | US9266392B2 (en) |
EP (1) | EP2780176A1 (en) |
JP (1) | JP6141297B2 (en) |
CN (1) | CN103946036B (en) |
AU (1) | AU2012339264B2 (en) |
BR (1) | BR112014011642A2 (en) |
RU (1) | RU2014118735A (en) |
WO (1) | WO2013071932A1 (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9266392B2 (en) * | 2011-11-14 | 2016-02-23 | Linak A/S | Castor control system |
US20170050467A1 (en) * | 2015-08-21 | 2017-02-23 | Tome, Inc. | Intelligent caster system with occupancy detection and optional solar panel for use with a furniture component |
WO2017066417A1 (en) * | 2015-10-13 | 2017-04-20 | Nishan Joshi | Overbed table |
US9944121B2 (en) * | 2015-08-24 | 2018-04-17 | Darcor Limited | Dual end remote swivel-lock for caster carts and carts equipped with same |
US10004651B2 (en) | 2012-09-18 | 2018-06-26 | Stryker Corporation | Patient support apparatus |
US20180289566A1 (en) * | 2017-04-06 | 2018-10-11 | Sechrist Industries, Inc. | Electrically actuated wheeled stretcher system |
US10568792B2 (en) | 2015-10-28 | 2020-02-25 | Stryker Corporation | Systems and methods for facilitating movement of a patient transport apparatus |
US10667772B2 (en) | 2015-09-29 | 2020-06-02 | Fujifilm Corporation | Radiation-irradiation device |
US10806653B2 (en) * | 2017-12-21 | 2020-10-20 | Stryker Corporation | Patient transport apparatus with electro-mechanical braking system |
US10932969B2 (en) | 2015-12-04 | 2021-03-02 | Arjo Ip Holding Ab | Indicator device |
USD926472S1 (en) * | 2019-03-14 | 2021-08-03 | It Luggage Limited | Luggage |
US12048661B2 (en) | 2020-09-16 | 2024-07-30 | Stryker Corporation | Patient transport apparatus with electro-mechanical braking system |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9393487B2 (en) | 2002-07-27 | 2016-07-19 | Sony Interactive Entertainment Inc. | Method for mapping movements of a hand-held controller to game commands |
GB201212765D0 (en) * | 2012-07-18 | 2012-08-29 | Huntleigh Technology Ltd | Hospital bed sensor system |
EP2909046A4 (en) * | 2012-10-19 | 2017-10-18 | Fallshaw Holdings Pty Ltd | Castor direction control |
EP2920006A1 (en) * | 2012-11-13 | 2015-09-23 | Linak A/S | Castor control system |
DE102014100056A1 (en) * | 2013-11-18 | 2015-05-21 | Tente Gmbh & Co. Kg | Control of rollers attached to a traveling part |
WO2017056348A1 (en) * | 2015-09-29 | 2017-04-06 | 富士フイルム株式会社 | Radiation emitting apparatus |
US9862230B2 (en) * | 2015-11-20 | 2018-01-09 | Barbara Dunston | Chair lock system |
CN105365483B (en) * | 2015-12-23 | 2019-06-25 | 联想(北京)有限公司 | Obstacle detouring castor assembly and wheeled apparatus including the obstacle detouring castor assembly |
CN106080034B (en) * | 2016-06-14 | 2018-05-15 | 广西大学 | A kind of universal chassis that vertically and horizontally straight line moving is accurately realized with controls connecting rod |
DE102016121217A1 (en) * | 2016-11-07 | 2018-05-09 | Carl Zeiss Meditec Ag | Rollable ophthalmic device |
US10864127B1 (en) | 2017-05-09 | 2020-12-15 | Pride Mobility Products Corporation | System and method for correcting steering of a vehicle |
US11701920B2 (en) | 2018-09-21 | 2023-07-18 | Nsk Ltd. | Driving wheel, carriage, and apparatus |
CN109045599B (en) * | 2018-10-30 | 2024-06-18 | 广东美的安川服务机器人有限公司 | Caster wheel moving device and rehabilitation training equipment |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4080809A (en) * | 1977-06-09 | 1978-03-28 | The Maytag Company | Caster brake control system |
US20060102392A1 (en) * | 2001-10-26 | 2006-05-18 | Johnson Daniel T | Bed transfer system |
US20070056141A1 (en) * | 2005-09-15 | 2007-03-15 | Sergio Armano | Powered locking caster wheel |
US7200894B2 (en) * | 2001-01-12 | 2007-04-10 | Tente-Rollen Gmbh & Co.Kg | Roller |
US20110010892A1 (en) * | 2009-07-16 | 2011-01-20 | Von Bordelius Ralph | Castor with brake device |
US20110120815A1 (en) * | 2005-11-10 | 2011-05-26 | Zbynek Frolik | Braking System for Patient Support |
US20110272200A1 (en) * | 2010-05-06 | 2011-11-10 | Clapp Timothy A | Selectively powered ambulatory stretcher chair |
US20120054983A1 (en) * | 2010-09-07 | 2012-03-08 | Adrian Steenson | Three-state caster assembly with swivel lock and wheel brake |
US20130160237A1 (en) * | 2011-12-23 | 2013-06-27 | Caremed Supply Inc. | Power-operated caster brake mechanism |
US20130227787A1 (en) * | 2012-03-02 | 2013-09-05 | Stryker Corporation | Patient support |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0822643B2 (en) * | 1991-09-20 | 1996-03-06 | パラマウントベッド株式会社 | Electric / manual combined caster interlocking lock operation mechanism |
US5377372A (en) | 1993-03-31 | 1995-01-03 | Hill-Rom Company, Inc. | Hospital bed castor control mechanism |
US7296312B2 (en) * | 2002-09-06 | 2007-11-20 | Hill-Rom Services, Inc. | Hospital bed |
CN101791261B (en) * | 2000-05-11 | 2013-04-24 | 希尔-罗姆服务股份有限公司 | Motorized traction device for a patient support |
DE10105614A1 (en) | 2001-01-12 | 2002-07-18 | Tente Rollen Gmbh & Co | role |
US6668965B2 (en) * | 2001-05-25 | 2003-12-30 | Russell W. Strong | Dolly wheel steering system for a vehicle |
CZ16128U1 (en) | 2005-11-10 | 2006-01-02 | Linet, Spol. S R. O. | Undercarriage for hospital bed |
US7886377B2 (en) * | 2006-10-13 | 2011-02-15 | Hill-Rom Services, Inc. | Push handle with rotatable user interface |
US7882582B2 (en) * | 2006-10-13 | 2011-02-08 | Hill-Rom Services, Inc. | User interface and control system for powered transport device of a patient support apparatus |
US8205297B2 (en) | 2007-06-06 | 2012-06-26 | Fallshaw Holdings Pty Ltd | Swivel castor braking system |
FI7965U1 (en) | 2008-02-27 | 2008-08-06 | Mannerin Konepaja Ab Oy | Device Wheel |
AU2012339264B2 (en) * | 2011-11-14 | 2017-04-13 | Linak A/S | Castor control system |
-
2012
- 2012-11-13 AU AU2012339264A patent/AU2012339264B2/en not_active Withdrawn - After Issue
- 2012-11-13 EP EP12805926.8A patent/EP2780176A1/en not_active Withdrawn
- 2012-11-13 BR BR112014011642A patent/BR112014011642A2/en not_active Application Discontinuation
- 2012-11-13 CN CN201280055758.4A patent/CN103946036B/en not_active Expired - Fee Related
- 2012-11-13 JP JP2014540321A patent/JP6141297B2/en not_active Expired - Fee Related
- 2012-11-13 WO PCT/DK2012/000120 patent/WO2013071932A1/en active Application Filing
- 2012-11-13 RU RU2014118735/11A patent/RU2014118735A/en not_active Application Discontinuation
- 2012-11-13 US US14/358,111 patent/US9266392B2/en not_active Expired - Fee Related
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4080809A (en) * | 1977-06-09 | 1978-03-28 | The Maytag Company | Caster brake control system |
US7200894B2 (en) * | 2001-01-12 | 2007-04-10 | Tente-Rollen Gmbh & Co.Kg | Roller |
US20060102392A1 (en) * | 2001-10-26 | 2006-05-18 | Johnson Daniel T | Bed transfer system |
US20070056141A1 (en) * | 2005-09-15 | 2007-03-15 | Sergio Armano | Powered locking caster wheel |
US20110120815A1 (en) * | 2005-11-10 | 2011-05-26 | Zbynek Frolik | Braking System for Patient Support |
US20110010892A1 (en) * | 2009-07-16 | 2011-01-20 | Von Bordelius Ralph | Castor with brake device |
US20110272200A1 (en) * | 2010-05-06 | 2011-11-10 | Clapp Timothy A | Selectively powered ambulatory stretcher chair |
US20120054983A1 (en) * | 2010-09-07 | 2012-03-08 | Adrian Steenson | Three-state caster assembly with swivel lock and wheel brake |
US20130160237A1 (en) * | 2011-12-23 | 2013-06-27 | Caremed Supply Inc. | Power-operated caster brake mechanism |
US20130227787A1 (en) * | 2012-03-02 | 2013-09-05 | Stryker Corporation | Patient support |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9266392B2 (en) * | 2011-11-14 | 2016-02-23 | Linak A/S | Castor control system |
US10004651B2 (en) | 2012-09-18 | 2018-06-26 | Stryker Corporation | Patient support apparatus |
US20170050467A1 (en) * | 2015-08-21 | 2017-02-23 | Tome, Inc. | Intelligent caster system with occupancy detection and optional solar panel for use with a furniture component |
US9969216B2 (en) * | 2015-08-21 | 2018-05-15 | Tome, Inc. | Intelligent caster system with occupancy detection and optional solar panel for use with a furniture component |
US9944121B2 (en) * | 2015-08-24 | 2018-04-17 | Darcor Limited | Dual end remote swivel-lock for caster carts and carts equipped with same |
US10667772B2 (en) | 2015-09-29 | 2020-06-02 | Fujifilm Corporation | Radiation-irradiation device |
WO2017066417A1 (en) * | 2015-10-13 | 2017-04-20 | Nishan Joshi | Overbed table |
US9788647B2 (en) * | 2015-10-13 | 2017-10-17 | Nishan Joshi | Overbed table |
US10905612B2 (en) | 2015-10-28 | 2021-02-02 | Stryker Corporation | Systems and methods for facilitating movement of a patient transport apparatus |
US10568792B2 (en) | 2015-10-28 | 2020-02-25 | Stryker Corporation | Systems and methods for facilitating movement of a patient transport apparatus |
US10932969B2 (en) | 2015-12-04 | 2021-03-02 | Arjo Ip Holding Ab | Indicator device |
WO2018187144A1 (en) * | 2017-04-06 | 2018-10-11 | Sechrist Industries, Inc. | Electrically actuated wheeled stretcher system |
US20180289566A1 (en) * | 2017-04-06 | 2018-10-11 | Sechrist Industries, Inc. | Electrically actuated wheeled stretcher system |
US20210121337A1 (en) * | 2017-04-06 | 2021-04-29 | Sechrist Industries, Inc. | Electrically actuated wheeled stretcher system |
US10806653B2 (en) * | 2017-12-21 | 2020-10-20 | Stryker Corporation | Patient transport apparatus with electro-mechanical braking system |
USD926472S1 (en) * | 2019-03-14 | 2021-08-03 | It Luggage Limited | Luggage |
US12048661B2 (en) | 2020-09-16 | 2024-07-30 | Stryker Corporation | Patient transport apparatus with electro-mechanical braking system |
Also Published As
Publication number | Publication date |
---|---|
AU2012339264A1 (en) | 2014-04-24 |
CN103946036B (en) | 2017-09-29 |
EP2780176A1 (en) | 2014-09-24 |
BR112014011642A2 (en) | 2017-05-02 |
WO2013071932A1 (en) | 2013-05-23 |
US9266392B2 (en) | 2016-02-23 |
RU2014118735A (en) | 2015-12-27 |
JP6141297B2 (en) | 2017-06-07 |
JP2014533217A (en) | 2014-12-11 |
AU2012339264B2 (en) | 2017-04-13 |
CN103946036A (en) | 2014-07-23 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US9266392B2 (en) | Castor control system | |
AU2013347308B2 (en) | Castor control system | |
AU2019201370B2 (en) | Powered ambulance cot with an automated cot control system | |
CN102939206B (en) | Braking system for patient support | |
US10004651B2 (en) | Patient support apparatus | |
EP2695592B1 (en) | Person support apparatus power drive system | |
WO2015079735A1 (en) | Electrical brake mechanism for caster | |
US20150266342A1 (en) | Castor direction control | |
US20230255839A1 (en) | Patient support apparatus | |
US20220071824A1 (en) | Pedal assembly for a patient support apparatus | |
JP5745711B1 (en) | Caster electric brake structure | |
CA2880614C (en) | System for propelling hospital bed | |
WO2023222146A1 (en) | Patient support apparatus having central dual control system of casters |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: LINAK A/S, DENMARK Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BROENDUM, PETER;REEL/FRAME:032888/0787 Effective date: 20140409 |
|
STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
|
FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
DC | Disclaimer filed |
Free format text: DISCLAIM THE REMAINING TERM OF SAID PATENT Effective date: 20180130 |
|
FEPP | Fee payment procedure |
Free format text: MAINTENANCE FEE REMINDER MAILED (ORIGINAL EVENT CODE: REM.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
LAPS | Lapse for failure to pay maintenance fees |
Free format text: PATENT EXPIRED FOR FAILURE TO PAY MAINTENANCE FEES (ORIGINAL EVENT CODE: EXP.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
|
FP | Lapsed due to failure to pay maintenance fee |
Effective date: 20200223 |